stahlecker etal



March 17, 1964 w. STAHLECKER ETAL 3,125,383.

TOP ROLLER MOUNTING IN A SPINNING MACHINE Filed June 6, 1960 INVENTORSM4 HELH $771HLECKI ATTORNEYS United States Patent 3,125,383 TOP ROLLERMOUNTING IN A SPINNING MACHINE Wilhelm Stahlecker, Rossteige 28,Tieringen, near Balingen, Germany, and Sigmund Kemmler, Schultheiss-Schneider Strasse, Geislingen/Steige, Germany Fiied June 6, 1960, Ser.No. 34,204 Claims priority, application Germany June 26, 1959 3 Claims.(Cl. 308-174) The invention relates to top roller mountings for spinningmachines wherein independently rotatable top rollers are arranged inpairs on a common shaft, the journal of each top roller having twospaced ball bearing tracks, whereas the bore of the mounting sleeve forsuch roller is trackless.

In top roller mountings of the kind above referred to it is known toprovide means for effecting the axial guidance of the mounting sleevesof such rollers, such means comprising, for example, spacer bushes thelength of which is exactly adapted for the purpose and which havevertically ground end faces. Such expedients have for their object toobtain play-free running of the sleeves as far as possible. It has alsobeen proposed to obtain said guidance by means of bodies having conicalguide surfaces for the balls the said bodies being provided with ascrew-thread intended to afford such adjustment as will give minimumaxial play.

In all cases, the ball-engaging surfaces, which are not rolling surfacesbut frictional surfaces, had to be machined to the best possible surfacequality. The manufacture of top rollers is rendered very expensive byprecision operations in the production of the aforesaid spacer bushesand the machining of the aforesaid guide bodies.

According to the present invention the running properties of a toproller can be considerably improved by providing in combination with themounting sleeve for such roller axial guidance means comprising springrings which may take the form of conventional type resilient split ringsperipherally engaged in grooves in the bore of said sleeve, and abutmentrings which are not specially machined but are stamped preferably fromspring steel, each abutment ring being interposed between the balls in atrack and an adjacent one of said spring rings whereby the said sleevereceives axial guidance whilst the balls in said tracks are permitted torun with a small amount of axial play.

As a result of the natural unevenness of the surface of the abutmentrings, which have not been specially machined, each of the said ringsbears only with the highest surface bumps against a small number of theballs or even against only one of the balls in a track. The other balls,on the other hand, have no contact with the abutment rings, so that nofriction forces due to axial guidance can arise at these balls.Moreover, it may be expected that, as a result of the angle of contactbetween the surface bumps and a ball, the abutment ring will be pressedaway from the row of balls in a track, so that then practically all theballs in such track run without contact with the side surface of suchring. The play permitted between the rows of balls and the abutmentrings also prevents any jamming. The effect described is furtherassisted by the fact that the axial forces are only small.

A further advantage of the arrangement according to the invention isthat the top roller mountings can be manufactured extremelyinexpensively.

The invention will be hereinafter explained in greater detail withreference to the annexed drawing, wherein:

FIGURE 1 is a sectional elevation of a mounting wherein axial guidancein both directions is effected at one row of balls only;

FIGURE 2 is a similar view of a mounting wherein ax1a1 guidance in onedirection is effected at one row of balls and in the opposite directionat the other row of balls; and

FIGURE 3 is a side elevation in reduced scale of a shaft provided ateach end with a roller mounting such as illustrated in FIGURE 1.

In FIGURE 1, a top roller shaft 16 has a journal 1 in which spaced balltracks 2 and 3 are formed. A mounting sleeve or hub 4 with a tracklessbore runs on the two rows of balls, the top roller 4' indicated by chainlines being finally fitted on said sleeve 4. The bore of the sleeve 4 isformed with partly conical annular recesses 5 and 6, in which theperipheries of spring rings 7 and 8 are instered one at each side of arow of balls. These spring rings 7, 8 prevent any yielding of lateralabutment rings 9 and 10, interposed between the row of balls and arespective spring ring. These abutment rings 9 and 10 are not speciallymachined but are stamped out of preferably spring steel, so that anecessary amount of play is ensured. The abutment rings 9 and 10 in thisexample fit freely in the bore of the sleeve 4. A sealing cap 11 whichmay be made of plastic material is fitted in the outer end of the sleeve4 and a fly-repelling ring 12 is fitted around the top roller shaft andwithin the inner end of said sleeve.

FIGURE 3 shows the top roller shaft 16 with the above described rollermounting structure on each end thereof.

In FIGURE 2, reference 1' denotes the journal of a top roller shaft inwhich journal ball tracks 2 and 3' are formed. In this example,shoulders 13 and 14 for engaging the abutment rings 9 and 10' are formedin the bore of the mounting sleeve 15 upon which is mounted the toproller 15' indicated in chain lines. The shoulders 13 and 14 are formednear respective ends of the sleeve 15 and so that the abutment ring It)lies at the outer side of the left hand row of balls Whereas theabutment ring 9 lies at the inner side of the right hand row of balls.Annular recesses 5' and 6' for engaging with the peripheries of springrings 7 and 8' are formed adjacent to respective shoulders 14 and 13.The spring rings 7' and 8 bear against the conical part of the recesses5', 6', so that the rings 9 and 10 are pressed against the shoulders 13and 14 and thus secured in their position for axial guidance, suchguidance being efiected in one direction by the rings 10', 8' at one rowof balls and in the opposite direction by the rings 9 7' at the otherrow of balls. In this example also a sealing cap 11' and a flyrepellingring 12' are provided.

As in the case of the FIGURE 1 embodiment, individual roller mountingsas described above are mounted on each end of a shaft like shaft 16 ofFIGURE 3.

We claim:

1. A top roller mounting in a spinning machine wherein a top roller ismounted for rotation on a shaft, means for journalling said top rolleron said shaft comprising a sleeve, rows of ball bearings received inspaced tracks on said shaft, guidance means providing axial guidance ofsaid sleeve, said guidance means comprising spring rings disposed oneither side of one of said ball bearing rows, said spring rings beingspaced from said shaft and being received in grooves in the bore of saidsleeve, and abutment rings intermediate and in contact with said springrings and the balls of said one of said ball bearing rows.

2. A top roller mounting in a spinning machine wherein independentlyrotatable top rollers are arranged in pairs on a common shaft, amounting sleeve for each of said top rollers, a journal at each end ofsaid shaft within said mounting sleeve having two spaced ball bearingtracks and rows of balls in said tracks whereas the bore of saidmounting sleeve is trackless, said mounting comprising the combinationwith said sleeve of axial guidance means comprising spring rings spacedfrom said shaft and peripherally engaged in grooves in the bore of saidsleeve, and stamped steel abutment rings, one each of said abutmentrings being interposed between and in contact with one of said rows ofballs and an adjacent one of said spring rings, one of said abutmentrings being disposed to the right of at least one of said rows of ballsand another of said abutment rings being disposed to the left of both ofsaid rows of balls, as seen in side view whilst the said balls in saidtracks are permitted to run with a small amount of axial play, saidspring rings andabutrnent rings being so arranged that axial guidance inboth directions is effected at one row only of balls.

3. A top roller mounting according to claim 2, wherein the abutmentrings are freely mounted within the bore of the said sleeve.

References Cited in the file of this patent UNITED STATES PATENTS

1. A TOP ROLLER MOUNTING IN A SPINNING MACHINE WHEREIN A TOP ROLLER ISMOUNTED FOR ROTATION ON A SHAFT, MEANS FOR JOURNALLING SAID TOP ROLLERON SAID SHAFT COMPRISING A SLEEVE, ROWS OF BALL BEARINGS RECEIVED INSPACED TRACKS ON SAID SHAFT, GUIDANCE MEANS PROVIDING AXIAL GUIDANCE OFSAID SLEEVE, SAID GUIDANCE MEANS COMPRISING SPRING RINGS DISPOSED ONEITHER SIDE OF ONE OF SAID BALL BEARING ROWS, SAID SPRING RINGS BEINGSPACED FROM SAID SHAFT AND BEING RECEIVED IN GROOVES IN THE BORE OF SAIDSLEEVE, AND ABUTMENT RINGS INTERMEDIATE AND IN CONTACT WITH SAID SPRINGRINGS AND THE BALLS OF SAID ONE OF SAID BALL BEARING ROWS.